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首页> 外文期刊>Slovak Raptor Journal >Estimating density, population size and dynamics of Common Buzzard (Buteo buteo) in the West Carpathian region by a new method
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Estimating density, population size and dynamics of Common Buzzard (Buteo buteo) in the West Carpathian region by a new method

机译：用一种新方法估算西喀尔巴阡地区普通B的密度，种群大小和动态

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In the Hornr Ponitrie Region (central Slovakia) during 1991-2001 we conducted a regular survey of Common Buzzard nests. In 2002-2006 our sampling effort increased and within the selected areas we studied buzzard dispersion/distribution, density and population dynamics using a new method of large-scale thorough search for nests with multiple nest check. The method is designed to estimate the dispersion/distribution, density and population size of target species (particularly raptors) at an absolute scale of abundance in large tracts of heterogeneous landscapes for studies of population fluctuations, trophic dynamics, reproductive success, habitat selection and use. It consists of systematic search for nests with extent of several tens of km2 and grain of c. 3000 m2, identifying and positioning the nests, and subsequent 1-3 nest checks during the each of three or more consecutive breeding periods. Further essential features include correct record of nest positions and other variables, combination of nest checks with ringing and marking, proportional sampling in apparently suitable and less suitable areas and proper timing and spacing of nest visits. In 2007 the sampling focused on DSF (Databank of Slovak Fauna) grid square 7377 covering c. 135 km2. We searched 71 km2 in total and estimated the density at 129 pairs/100 km2. Within the district of Prievidza (959 km2) we found 150 active buzzard nests. In 2008 we sampled the grid square 7377 more extensively, including higher altitudes (800-1200 m a. s. l.). Sampling of 82 km2 in total yielded the density estimate of 93 pairs/100 km2. Within the district of Prievidza we found 110 active buzzard nests. The reproductive success over four year period averaged 1.2 fledgling per active nest (n = 310 nests). Our sample enabled us to estimate the minimum population size in the whole grid square 7377 at 130 breeding pairs, i.e. 96 pairs/100 km2. Minimum population size for the whole district of Prievidza can be estimated approximately at 500 breeding pairs (52 pairs/100 km2), c. 350 of which breed in mountain forests, c. 80 in agricultural woodlots, and c. 70 in riparian vegetation. Rough estimate of minimum breeding population in the whole Slovakia is c. 15 000 pairs, i.e. on average 31 pairs/100 km2.
机译：在1991-2001年间，在Hornr Ponitrie地区（斯洛伐克中部），我们对普通秃鹰巢进行了定期调查。在2002年至2006年间，我们的采样工作有所增加，在选定的区域内，我们使用一种新的大规模彻底搜索巢并进行多重巢检查的方法研究了秃鹰的散布/分布，密度和种群动态。该方法旨在估计目标物种（特别是猛禽）在大片异质景观中的绝对绝对规模下的分散/分布，密度和种群大小，以研究种群波动，营养动态，繁殖成功，生境选择和使用。它包括系统搜索范围为几十km2的巢和c粒。 3000平方米，确定并定位巢，并在三个或更多个连续繁殖期间的每个期间进行随后的1-3个巢检查。其他基本特征包括：正确记录产蛋位置和其他变量，将产蛋检查与振铃和标记相结合，在明显合适和不太合适的区域进行比例采样，以及产蛋访视的适当时间和间隔。在2007年，抽样集中在DSF（斯洛伐克动植物数据库）网格正方形7377上，覆盖c。 135平方公里我们总共搜索了71 km2，并估计密度为129对/ 100 km2。在Prievidza区域（959平方公里）内，我们发现了150个活跃的秃鹰巢。 2008年，我们对网格广场7377进行了更广泛的采样，包括更高的海拔（800-1200 m a。s。l。）。总共进行了82 km2的采样，得出的密度估计为93对/ 100 km2。在Prievidza地区，我们发现了110个活跃的秃鹰巢。四年期间的繁殖成功率平均为每个活动巢1.2羽雏（n = 310巢）。我们的样本使我们能够估计130个育种对（即96对/ 100 km2）下整个方格7377的最小种群大小。 Prievidza整个地区的最小种群规模约为500个繁殖对（52对/ 100 km2），c。其中350个在山区森林中繁殖; c。在农业林地中占80，c。在河岸植被中占70。整个斯洛伐克的最小繁殖种群的粗略估计为c。 1.5万对，即平均31对/ 100 km2。

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